From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0A24EE77199 for ; Thu, 9 Jan 2025 07:05:05 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 865136B0083; Thu, 9 Jan 2025 02:05:04 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 8148B6B0085; Thu, 9 Jan 2025 02:05:04 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6B6946B0088; Thu, 9 Jan 2025 02:05:04 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 4D38D6B0083 for ; Thu, 9 Jan 2025 02:05:04 -0500 (EST) Received: from smtpin18.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 0C935B0C7B for ; Thu, 9 Jan 2025 07:05:04 +0000 (UTC) X-FDA: 82987026528.18.F985D7F Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by imf09.hostedemail.com (Postfix) with ESMTP id A4B4E140011 for ; Thu, 9 Jan 2025 07:05:01 +0000 (UTC) Authentication-Results: imf09.hostedemail.com; dkim=pass header.d=quicinc.com header.s=qcppdkim1 header.b=O5Xa5hWT; dmarc=pass (policy=none) header.from=quicinc.com; spf=pass (imf09.hostedemail.com: domain of quic_zhenhuah@quicinc.com designates 205.220.168.131 as permitted sender) smtp.mailfrom=quic_zhenhuah@quicinc.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1736406301; a=rsa-sha256; cv=none; b=n7VrQPouBgLbZjiMCkYTj6yYQNA/+TyRshjWHXgZm12QLiVSDLRtvblK+ruXphaLmkEePJ ZpI9Fb0d4DjZDqxvEMAU/YO9KpL8a37oWbtf309cOerRneRMY7G0ENsUTEw0LdIkz9cKgr LBYGxzFcje9zlKgbyb5AzmJBLljZFHY= ARC-Authentication-Results: i=1; imf09.hostedemail.com; dkim=pass header.d=quicinc.com header.s=qcppdkim1 header.b=O5Xa5hWT; dmarc=pass (policy=none) header.from=quicinc.com; spf=pass (imf09.hostedemail.com: domain of quic_zhenhuah@quicinc.com designates 205.220.168.131 as permitted sender) smtp.mailfrom=quic_zhenhuah@quicinc.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1736406301; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=faXKx5JyBLEPD6tryFnH16a9m3UBc5HuVMYyWfnWTQ0=; b=n4Ypfq7c/ciLsajyU+IgIVy6HU0VPeo1bzHVuTli19T6GtnHJqrumzSkFUdZE7tERyQ5C1 1IFoljsCrLbXuHyfIEvBH2t4QeccJ1ZslRrSZPfebedGXxcgEDP0IF+BaMGGhmDqGtkdt7 6wbX/RuUrefbdj4ubqpZWCJ4vZSF4Q4= Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 5094EvRY009614; Thu, 9 Jan 2025 07:04:55 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= faXKx5JyBLEPD6tryFnH16a9m3UBc5HuVMYyWfnWTQ0=; b=O5Xa5hWTTPHEDWYg /rs4WIueZxRilD6XHR15CzpvIApum2UBoJwBU0pIhFVpii/Hn0WJaHEwGOk6j00w I2TOIySvT54dTO91J582x0MVxx6fnD1/+Nq8Bix50AMgwqvHvbG6d0Uvmc0r441u 8vxyBElYvqqsYlBEI+cRBKKecLW4Cmxi6PrWVM2Rr/Qa/PUehiBZyZmKBC4o1UFS 4PdsVWWXKJ+IY9T8DMbPFuO8ube2mm/NF2cWPxlUUC5Bfj8M91QDCYYXvocY0B9A puOAYPIRSyTC40aB/eLWSb71tbqqqKX0hTUQiyRboiu4f4hfOYz5TPzwkFWsZTwM 2730Uw== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 44278t8b03-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 09 Jan 2025 07:04:54 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA05.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 50974s5Q010347 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 9 Jan 2025 07:04:54 GMT Received: from [10.239.132.245] (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Wed, 8 Jan 2025 23:04:50 -0800 Message-ID: <169f8006-ff33-48ca-a680-37fe1cf0efe8@quicinc.com> Date: Thu, 9 Jan 2025 15:04:48 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4] arm64: mm: Populate vmemmap/linear at the page level for hotplugged sections To: Anshuman Khandual , Catalin Marinas CC: , , , , , , , , , , , , , References: <20250107074252.1062127-1-quic_zhenhuah@quicinc.com> Content-Language: en-US From: Zhenhua Huang In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: 6sl83KDxCPtkIpOtbE4vMDGqTTuXFubv X-Proofpoint-ORIG-GUID: 6sl83KDxCPtkIpOtbE4vMDGqTTuXFubv X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 priorityscore=1501 bulkscore=0 lowpriorityscore=0 malwarescore=0 impostorscore=0 phishscore=0 adultscore=0 mlxlogscore=724 suspectscore=0 clxscore=1015 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2501090056 X-Stat-Signature: kpsoc5gbqpaoe9zfsmutn7afw8bhi6tj X-Rspam-User: X-Rspamd-Queue-Id: A4B4E140011 X-Rspamd-Server: rspam08 X-HE-Tag: 1736406301-338803 X-HE-Meta: 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 ReqrpkMb /LE8y3cU4EexHaJtKMN5ws1ZXI4rAdU1weh+5xJSNTg9UcJosmGS4Cu8ZgsH2dAVFwI3GJgpKlqy47WR3eKGxEPA5N13nJGLwphrhGLxqSkDPywFOn8CKteMEGDZtbzUFe3cCBngZ9Qkr1HeojQDlfZe8lt7j72wfbQZgkdfp79mZKPJjcVhmpHO8HZg758GOfReUR9wHI0E+dhbWGu/nekU5bRz3wuVKQul94SxoSIYm55n8aC5vo3LmuWuuEbXO/It01t1PsLwuRj6SPmCzHF7KvX+F3/zS2dORtOCS0Ege1XxdwuHsNnp/9g== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 2025/1/8 18:11, Anshuman Khandual wrote: > Just wondering why not start with PUD level itself ? Although SUBSECTION_SHIFT > might never reach the PUD level but this will help keep the flags calculations > bit simple and ready for all future changes. > I suppose that it's because these are significantly larger than 2M, whereas Catalin assumed SUBSECTION_SIZE would not increase? His comment: "should cover any changes to SUBSECTION_SHIFT making it *smaller* than 2MB. " > flags = 0; > if (SUBSECTION_SHIFT < PUD_SHIFT) > flags |= NO_PUD_BLOCK_MAPPINGS; > if (SUBSECTION_SHIFT < CONT_PMD_SHIFT) > flags |= NO_PMD_CONT_MAPPINGS;